_Butterfly._--Dimorphic, in the form _dryas_ with the hind wings heavily suffused with black, in the form _harrisi_ predominantly fulvous. Expanse, 1.75-2.00 inches. The caterpillars feed upon the _Urticaceæ_, and are very common upon the nettle. They vary greatly in color, some being almost snow-white. This species is found throughout Canada and the adjacent provinces, and ranges south to the Carolinas and Texas and over the Northwestern States. (3) =Grapta satyrus=, Edwards, Plate XX, Fig. 1, ♀; Fig. 2, ♀, _under side_; form =marsyas=, Edwards, Plate XIX, Fig. 14, ♂; Fig. 15, ♂, _under side_; Plate III, Fig. 33, _larva_; Plate IV, Figs. 41, 42, _chrysalis_ (The Satyr). _Butterfly._--The species is so accurately depicted in the plates that a description is hardly necessary. The form _marsyas_ is smaller, brighter, and with the dark spots on the upper side of the hind wings reduced in size. Expanse, 1.75-2.00 inches. The food-plant of the caterpillar is the nettle. It occurs occasionally in Ontario, and thence ranges west, being not uncommon from Colorado to California and Oregon. (4) =Grapta hylas=, Edwards, Plate XIX, Fig. 7, ♂; Fig. 8, ♂, _under side_ (The Colorado Angle-wing). _Butterfly._--The butterfly closely resembles _G. silenus_ on the upper side, but may easily be distinguished by the uniform pale purplish-gray of the lower side of the wings. Expanse, 2.00 inches. The early stages are unknown. The insect has thus far been found only in Colorado, but no doubt occurs in other States of the Rocky Mountain region. (5) =Grapta faunus=, Edwards, Plate XIX, Fig. 12, ♂; Fig. 13, ♂, _under side_; Plate III, Fig. 32, _larva_; Plate IV, Figs. 31, 33-35, _chrysalis_ (The Faun). _Butterfly._--This species is readily recognized by the deep indentations of the hind wings, the heavy black border, and the dark tints of the under side mottled with paler shades. Expanse, 2.00-2.15 inches. The caterpillar feeds on willows. It is found from New England to the Carolinas, and thence westward to the Pacific. (6) =Grapta zephyrus=, Edwards, Plate XX, Fig. 5, ♂; Fig. 6, ♂, _under side_ (The Zephyr). _Butterfly._--Fulvous, marked with yellowish toward the outer margins, the dark markings upon which are not as heavy as in the other species of the genus. On the under side the wings are paler than is the case in other species, reddish-brown, marbled with darker brown lines and frecklings. Expanse, 1.75-2.00 inches. The caterpillar, which feeds upon _Azalea occidentalis_, is described and figured by Edwards in "The Butterflies of North America," vol. i. _Zephyrus_ is found throughout the region of the Rocky Mountains, from Colorado to California, and from Oregon to New Mexico. (7) =Grapta gracilis=, Grote and Robinson, Plate XIX, Fig. 10, ♂; Fig. 11, ♀, _under side_ (The Graceful Angle-wing).